Boiler compound.



UNITED STATES,

PATENT OFFICE.-

PETERB. BIRD, on NEW roan, 1:.

BOILER COMPOUND.

Specification of Letters Patent.

Patented Jan. 23, 1906.

Application filed July 3, 1905. Serial No. 268,187,

To (1,17 whom it may concern.

and Processes of Making the Same, of which the following is a full, clear, and exact specification.

This invention relates to improvements in boiler compounds and process of making the same, such as are adapted to remove scale,

oil, and grease to prevent the formation of' new, as well as pitting, corrosion, and galvanic action, and which obviates the necessity of using zinc without cutting lubrication, injuring packing, or causing foaming and priming. These objects I accomplish by means of a compound which forms when combined with the solid matters carried by the water amalgams or glazes which protect the boilerplate without involving-loss of heat or the production of hard closely-adhering scale.

The compound which is the subject of this invention comprises mercury combined with an alkaline salt or earth, together with a vegetable astringent, as tannin, gambia sumac, hemlock, or the substance commercially known as kutch, and small proportions of animal oil, and a carbohydrate, such as dextrine, gum-arabic, starch, or molasses. This v compound I make up in the form of a soluble extract or viscous substance in which the ingredients are all thorou hly combined ready to be used upon the a dition of water and which can be made up and stored without danger of deterioration.

In making up my lmproved extract compound I use approxlmately the following proportions, viz: one pound of vegetable astringent, as tannin, one pound of alkali, as soda ash, and boil in about one pint of water until dissolved. Then to this solution is added one pound, of carbohydrate, such as above mentioned, to each gallon of liquid and the solution boiled until the carbohydrate is dissolved. This solution is then cooled, and to each gallon thereof is added about ten ounce s of a saturated solution of mercury, preferably in the form of a salt, as nitrate, oXid, or

chlorid, in an oil such, for instance, as animal oil or its equivalent-Which solution'of mercury salt dissolves in the alkali solution, forming a heavy viscous substance or paste, the whole being then ready for use upon the found that this paste will keep indefinitely this extract form can be shiaped long distances, thus making it suitab le for ships on long voyages and enabling a sufficient supply to be carried for a complete voyage.

not to be restricted to the exact proportions above mentioned, as these will vary in details according to the particular nature of the water with which-the compound is to be used.

- Inusing 'the'compound I add-about one pound for each hundred horse-power to re move the scale already formed and thereafter smaller quantities to prevent the formation will be caused to be formed by my compound on the surface of the boiler below the water line, which revents pitting, corrosion, and galvanic action without being'of such nature as to cause loss of heat. The action of my compound is generally to clean the surface of the boiler-plate and then to cause a deposit thereon of a thin metallic amalgam or glaze to which scale will not adhere. Further chemical action on the boiler-plate is thus prevented, as well as increase in the thickness of the cretion, This compound also removes all oil, grease, and other matters without itself attackingpackings or bearings or formin substances which would do so. further small quantities .of my compound at intervals causes in some cases only a soft sludge or mud to be formed, which can be easily blownout, and in others the solid ma ters are held in suspension, depending upon the nature of the watersused. I thus by my compound revent galvanic action and do away with t e necessity of using zinc and prevent injury to the'boiler.

Having thus described my invention, I declare that what I claimasnew, and desire to secure by Letters Patent, is

1.. The herein-described compound for preventing incrustation in boilers, comprising vegetable acid, alkaline salt, carbohydrate as herein specified, mercury, and oil in about the proportions described.

2. The process. of forming a paste boiler compound, consisting in boiling together roportions of vegetable astringent and all fali, dissolvin therein by boiling, a roportion of carbohydrate as herein specified and adding without separation or deterioration. and in.

of new. A thin closely-adhering amalgam The additlon of addition of water to make it fluid. I have It will be understood that the invention is coating when once formed ,by continued acpaste, as luticn of mercury and oil, substantially as described.v 1o

-I testlmony whereof 'I affix my signature n presence of two Witnesses.

thereto, when at a suitabletemperature, a'soliltion ofmercury in animal oil, whereby a paste of permanent character is formed. 7

3. The process of forming a boiler com- 5 pound, consisting'in makingasolutien-of one 7 PETER B. BIRD.

or more substances, such as alkali, vegetable Witnesses: acid; and carbohydrate as herein specified,- J LIAN S. WOOSTER,

andadding thereto to form a permanent"; GEO.- A". HOFFMAN; 

